Physics – Condensed Matter – Superconductivity
Scientific paper
2006-06-23
Physics
Condensed Matter
Superconductivity
2 pages, submitted to Physica C (M2S-HTSC 2006 Proceedings)
Scientific paper
10.1016/j.physc.2007.03.426
We report a study of the temperature dependence of the surface resistance RS in the graphite intercalated compound (GIC) CaC6, where superconductivity at 11.5 K was recently discovered. Experiments are carried out using a copper dielectrically loaded cavity operating at 7 GHz in a "hot finger" configuration. Bulk CaC6 samples have been synthesized from highly oriented pyrolytic graphite. Microwave data allows to extract unique information on the quasiparticle density and on the nature of pairing in superconductors. The analysis of RS(T) confirms our recent experimental findings that CaC6 behaves as a weakly-coupled, fully gapped, superconductor.
Andreone Antonello
Cifariello G.
Emery Nicolas
Gennaro Emiliano Di
Herold Christoph
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